Kleinanzeigen Categories (open data)

A structured, machine-readable map of Kleinanzeigen.de's full category tree — category / subcategory IDs, names, and parent → child relationships, three levels deep. Extracted and maintained as part of building AnzeigenBoost, a Chrome extension for Kleinanzeigen sellers.

Kleinanzeigen publishes no official API and no category reference, so anyone building tools against the platform ends up re-deriving this by hand from the "Anzeige aufgeben" form. This repo is that reference, kept current and open for anyone to use.

634 categories — 15 top-level, 143 second-level, 476 third-level.

What's here

Data shape

{
  "17": {
    "label": "Familie, Kind & Baby",
    "id": "17",
    "subcategories": {
      "19": {
        "label": "Baby- & Kinderschuhe",
        "id": "19",
        "subcategories": {
          "sneaker_sportschuhe": { "label": "Sneaker & Sportschuhe", "id": "sneaker_sportschuhe" }
        }
      }
    }
  }
}

• L1 and L2 IDs are numeric strings ("17", "19") and are globally unique — these are the IDs Kleinanzeigen uses in its own form markup and URLs.
• L3 IDs are slugs ("sneaker_sportschuhe") — L3 is an attribute-style refinement on the listing form, not a separate URL path. L3 slug IDs are not globally unique — the same refinement repeats under many parents (e.g. sneaker_sportschuhe appears under every shoe subcategory). Only the full L1 → L2 → L3 path is unique.
• subcategories is {} for leaf L1/L2 nodes. The deepest L3 leaves omit the key entirely ({ "label": …, "id": … }).

Usage

const tree = require("./data/kleinanzeigen-categories.json");

// Flatten to a list (L3 slug ids aren't unique, so a list beats a map here)
function flatten(node, trail = [], out = []) {
  for (const [id, cat] of Object.entries(node)) {
    const labels = [...trail, cat.label];
    out.push({ id, label: cat.label, path: labels.join(" > "), level: labels.length });
    if (cat.subcategories) flatten(cat.subcategories, labels, out);
  }
  return out;
}

const all = flatten(tree);

// by-id lookup is reliable for L1 + L2 (unique numeric ids)
const byId = Object.fromEntries(all.filter((c) => c.level <= 2).map((c) => [c.id, c]));

byId["19"];
// { id: "19", label: "Baby- & Kinderschuhe",
//   path: "Familie, Kind & Baby > Baby- & Kinderschuhe", level: 2 }

See examples/lookup-example.js for name → path lookup and a full listing.

How this was collected

The IDs and labels are read directly from the live category picker on Kleinanzeigen's "Anzeige aufgeben" page. When Kleinanzeigen changes its categories, this file goes stale until someone updates it — see CONTRIBUTING.md.

Last verified: 2026-08 (see git history for the exact date of the most recent data commit).

About AnzeigenBoost

AnzeigenBoost automates reposting, AI-optimized listings, and competitor tracking for Kleinanzeigen sellers. Free to try.

Contributing

Category data goes stale as Kleinanzeigen adds and renames categories — PRs welcome to keep this accurate. See CONTRIBUTING.md.

Looking for collaborators 🤝

I'm the solo developer behind AnzeigenBoost, and I'm looking for people interested in getting involved — code, product feedback, or exploring a deeper collaboration or partnership. If that sounds like you, open a Discussion or an issue and say hi.

License

MIT — see LICENSE. The category data is factual information about a public website and is provided as-is, with no warranty of accuracy or completeness. "Kleinanzeigen" is a trademark of its respective owner; this project is not affiliated with or endorsed by it.